drivers/net: use vzalloc()

Use vzalloc() and vzalloc_node() in net drivers

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Jon Mason <jon.mason@exar.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/cxgb4/cxgb4_main.c b/drivers/net/cxgb4/cxgb4_main.c
index f50bc98..848f89d1 100644
--- a/drivers/net/cxgb4/cxgb4_main.c
+++ b/drivers/net/cxgb4/cxgb4_main.c
@@ -868,12 +868,10 @@
  */
 void *t4_alloc_mem(size_t size)
 {
-	void *p = kmalloc(size, GFP_KERNEL);
+	void *p = kzalloc(size, GFP_KERNEL);
 
 	if (!p)
-		p = vmalloc(size);
-	if (p)
-		memset(p, 0, size);
+		p = vzalloc(size);
 	return p;
 }